Consolidated Statements of Changes in Shareholders' Equity (unaudited) (Parenthetical) - $ / shares	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Common Stock
Dividends payable (in dollars per share)	$ 0.11	$ 0.11	$ 0.11	$ 0.10	$ 0.09	$ 0.09
Restricted Stock
Unvested restricted shares (in shares)	55,713	59,217	59,217	78,508	78,508	46,511	46,511

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant